If you find a knowledgeable concrete installer, there are many things that can be done to
minimize the chances of cracking. It's all about the prep work, the concrete mix design, and the proper curing.

Expansion joints cut into the slab soon after it is finished will help greatly. I have had 6 major slabs poured and the ones with well placed expansion joints are crack free. The cracks that opened up during the curing process were all in the joints.

Forgot to add photo....

I was just told by my builder that all concrete cracks. As Sophie says, you work with it.

All concrete cracks. However if you like the stain concrete look it looks great even with cracks.

All concrete CAN crack, but as Carolyn pointed out, with cutting control joints in the right places, using admixtures, proper curing, and a few other tricks, the vast majority of cracking can be eliminated from any concrete surface. It takes knowledge, experience, and a little extra money in the budget to cover the labor and admixture costs.

I have used concrete floors in several of the homes we have built. They all crack but still add to the charm and still look great. They are super easy to care for and withstand all mishaps!

after 12 years I'm still in love with my floors!